AS the 125th edition of Wimbledon heads into its second week, all of the principal story lines are still there to be followed.

Roger Federer has yet to drop a set as he bids for a record-tying seventh championship. Rafael Nadal hasn't lost a set, either - the first time he's done that through three rounds - as he aims for a third Wimbledon title and 11th major trophy overall.

Novak Djokovic and Andy Murray are around, too. Murray hopes to give Britain its first male champion at the All England Club since 1936.

And then there are the Williams sisters, whose comebacks are producing win after win so far.

After yesterday's traditional day off, action resumes today with all 16 men's and women's fourth-round matches.

On Saturday, after some Centre Court dramatics against Marcos Baghdatis, Djokovic's bid for a first Wimbledon title was still alive.

Already annoyed at dropping his serve in the second set, the second-seeded Serb lost an 11-shot rally in the next game. As Baghdatis smiled and lapped up the ovation, Djokovic angrily thumped his racket into the turf, not just once, not even twice, but three times.

"I like to make sure," Djokovic joked.

Djokovic, who was warned by the umpire for racket abuse, finally came through 6-4, 4-6, 6-3, 6-4 after three hours, 15 minutes to reach the fourth round.

Djokovic will face Michael Llodra in the fourth round.

Six-time champion Federer beat David Nalbandian of Argentina 6-4, 6-2, 6-4 in the 19th career meeting between the two players. Federer now leads 11-8.